Cuvette



FIG. 1 is a top plan view of a cuvette, showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof, the left side elevational view being substantially identical; and,

FIG. 5 is a front perspective view thereof. 

The ornamental design for a cuvette, as shown and described. 